Corner key for fenestration unit frame



FIG. 1 is a front isometric view of a corner key for fenestration unit frame showing our new design.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIG. 4 is a left side elevation view thereof.

FIG. 5 is a right side elevation view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings illustrate portions of the corner key for fenestration unit frame which form no part of the claimed design. 

CLAIM The ornamental design for a corner key for fenestration unit frame, as shown and described. 